<template>
  <div class="demo">
    <div class="demo-title">用户头像</div>
    <div class="demo-content">
      <Upload
        v-model:file-list="fileList"
        class="demo-upload"
        name="avatar"
        list-type="picture-card"
        :show-upload-list="false"
        action="https://www.mocky.io/v2/5cc8019d300000980a055e76"
        :before-upload="beforeUpload"
        @change="handleChange"
      >
        <img v-if="imageUrl" :src="imageUrl" alt="avatar" />
        <div v-else>
          <LoadingOutlined v-if="loading" />
          <PlusOutlined v-else />
          <div class="ant-upload-text">Upload</div>
        </div>
      </Upload>
    </div>
  </div>
</template>

<script lang="ts" setup>
  import { ref } from 'vue';
  import { PlusOutlined, LoadingOutlined } from '@ant-design/icons-vue';
  import Message from '@sscd/message';
  import type { UploadChangeParam, UploadProps, FileType } from '@sscd/upload';
  import Upload from '@sscd/upload';
  function getBase64(img: Blob, callback: (base64Url: string) => void) {
    const reader = new FileReader();
    reader.addEventListener('load', () => callback(reader.result as string));
    reader.readAsDataURL(img);
  }
  const fileList = ref([]);
  const loading = ref<boolean>(false);
  const imageUrl = ref<string>('');
  const handleChange = (info: UploadChangeParam) => {
    if (info.file.status === 'uploading') {
      loading.value = true;
      return;
    }
    if (info.file.status === 'done') {
      // Get this url from response in real world.
      getBase64(info.file.originFileObj as FileType, (base64Url: string) => {
        imageUrl.value = base64Url;
        loading.value = false;
      });
    }
    if (info.file.status === 'error') {
      loading.value = false;
      Message.error('upload error');
    }
  };
  const beforeUpload = (file: UploadProps['fileList'][number]) => {
    const isJpgOrPng = file.type === 'image/jpeg' || file.type === 'image/png';
    if (!isJpgOrPng) {
      Message.error('You can only upload JPG file!');
    }
    const isLt2M = file.size / 1024 / 1024 < 2;
    if (!isLt2M) {
      Message.error('Image must smaller than 2MB!');
    }
    return isJpgOrPng && isLt2M;
  };
</script>

<style lang="less" scoped>
  .demo-upload {
    > .ant-upload {
      width: 128px;
      height: 128px;
    }
  }
  .ant-upload-select-picture-card i {
    font-size: 32px;
    color: #999;
  }
  .ant-upload-select-picture-card .ant-upload-text {
    margin-top: 8px;
    color: #666;
  }
</style>
